Home / 20,777.60-31,166.40-12,483.20

Finding the Fourth Proportional to 20,777.60, 31,166.40 and 12,483.20

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Solution

The fourth proportional to 20,777.60, 31,166.40 and 12,483.20 is: 18,724.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.60 : 31,166.40 = 12,483.20 : x
  2. Step 2: Convert to fraction form
    20,777.60/31,166.40 = 12,483.20/x
  3. Step 3: Cross multiply
    20,777.60x = 31,166.40 × 12,483.20
  4. Step 4: Simplify right side
    20,777.60x = 389,056,404.48
  5. Step 5: Solve for x
    x = 389,056,404.48/20,777.60
  6. Step 6: Final answer
    x = 18,724.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.